* MA map type is set incorrectly for some types of DIMM. Patch available.

+

* Mixing of memory widths appears to cause memory errors. The 256MB and 64MB DIMM from the table below show memory errors when installed together. Or maybe it's the width itself, since all the 8-bit-wide ones work.

−

* some memory errors persist even once the MA map type is set correctly; This may be caused by LB passing an incorrect e820 memory map. This conclusion is based on memtest86 passing all tests when "Probed" is selected for memory sizing, but failing when "BIOS-Std" or "BIOS-All" is selected.

* shutting down system does not turn off power.

* shutting down system does not turn off power.

+

* Hangs at ram detection. Patch which improves this but does not solve available 2007-06-04

+

* If the via_agp module is loaded, the machine resets. This can be worked around by blacklisting that kernel module. It may also be necessary to blacklist agpgart.

+

+

==Previous problems==

+

* MA map type is set incorrectly for some types of DIMM. Fixed as of r2653.

==MA Map Types==

==MA Map Types==

The values for MA map type refer to bits 15-13, 7-5, and 3-1 of offset 0x59-0x58 of the VT8601A host bridge. See the VT8601/PLE133 data sheet for details. All values other than 0xx and 100 are documented as "reserved (do not program)"

The values for MA map type refer to bits 15-13, 7-5, and 3-1 of offset 0x59-0x58 of the VT8601A host bridge. See the VT8601/PLE133 data sheet for details. All values other than 0xx and 100 are documented as "reserved (do not program)"

+

+

+

{| border="1"

{| border="1"

|+ Values determined by testing various modules with the factory BIOS.

|+ Values determined by testing various modules with the factory BIOS.

Revision as of 17:35, 13 June 2007

Current problems

Mixing of memory widths appears to cause memory errors. The 256MB and 64MB DIMM from the table below show memory errors when installed together. Or maybe it's the width itself, since all the 8-bit-wide ones work.

shutting down system does not turn off power.

Hangs at ram detection. Patch which improves this but does not solve available 2007-06-04

If the via_agp module is loaded, the machine resets. This can be worked around by blacklisting that kernel module. It may also be necessary to blacklist agpgart.

Previous problems

MA map type is set incorrectly for some types of DIMM. Fixed as of r2653.

MA Map Types

The values for MA map type refer to bits 15-13, 7-5, and 3-1 of offset 0x59-0x58 of the VT8601A host bridge. See the VT8601/PLE133 data sheet for details. All values other than 0xx and 100 are documented as "reserved (do not program)"

Values determined by testing various modules with the factory BIOS.

DIMM size

Row Density (SPD 31)

Width (SPD 13)

Rows(SPD 5)

MA map type

Works

512MB

256MB

8

2

0xe (111)

Yes (benh)

256MB

128MB

16

2

0xc (110)

No (hawke)

128MB

128MB

16

1

0xc (110)

No (hawke)

128MB

64MB

8

2

0x8 (100)

Yes (benh)

64MB

64MB

8

1

0x8 (100)

Yes (hawke)

I, the copyright holder of this work, hereby release it into the public domain. This applies worldwide.

In case this is not legally possible:I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.